The Federal and state governments will likely go broke, and people who depended on government benefits will feel a lot of hurt. Social Security will be long gone. Big liberal states like California will be hardest hit. Infrastructures will suffer and things like serviceable roads, law enforcement, and emergency services will deteriorate.
Depending on how successful Obama is in his effort to wreck our economy in general and our medical system in particular, doctors and hospitals will likely be few and far between.
Over the past couple of generations, a lot of worthless paper has changed hands because (1) loans were given to people who didn't have the means to repay them; and (2) politicians made promises that they didn't have the means to pay for.
The government and its agencies will grow hungry and mean - like any other predatory animal - and will increasingly focus their dwindling resources on functions that generate revenue. This means finding ever more creative ways to expropriate citizens of their money and belongings. So we can expect to see increases in everything from petty robberies such as parking tickets to major hauls like seizures of cars, homes, and businesses on the pretext that they were used for "drug trafficking".
End result is that survival strategies are going to go back to being what they've always been. Be honest, courteous, hardworking, competent, and educated, and associate with other people who are. Take care of those close to you and be ready to defend them - and yourself.